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    Thread: VW Firmware Update after Dieselgate: Effect on Performance

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      VW Firmware Update after Dieselgate: Effect on Performance

      Is it possible to backup the existing version of the ECU and then restore it back using VAG-COM cable if ECU firmware is updated by the workshop?

      Case in point : Firmware upgrade drive initiated by VW after dieselgate.

      tadukuttan, Digital Vampire, mclaren1885 and all the technical gurus.

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      Jack Sparrow Not possible using a VCDS cable anymore.

      For a complete revert, you would need to open up the ECU, connect to the board/eeprom using suitable tools, and then take a backup before you hit the showroom for an update.

      But in most cases, this is not required, and a soft revert is better. A shop with professional tools can look at the changes in calibration, and then revert just those changes without reverting to the old ECU firmware version.

      And most people hate what VW has been doing with their tunes, post the emissions scandal. So been working on this one quite a bit...
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      Today took mine 1.2 TDI for service with mind set for not to get the update. But at the end of the day, ended up getting the update after having long chat with a friendly technitian. They are also offering a free car care kit with the update, though I already have few car care stufs with me so that wasn't much of interest for me.

      I shown some articles to him which claim change in power figures after dyno tests, still he stood with his opinion. He said that none of the customer complaind so far, even there are 1.2 TDIs in his own family, one is with his uncle which he also drives occassionally, no diference whatsoever. Right now they are performing the updates on 1.2 TDI only

      He also took me on final examination drive of one 1.2 TDI which got the update, I also had a short drive of that car and didn't feel any significant change.

      He also told that the updates are usually reversible, not sure if this is applicable to this update also.

      When I drove my car back to home, I didn't feel any such adverse change during that short drive. The usual turbo kick feel of 2nd and 3rd gears still exists there, low end torque also seem to be same.

      Will update if I feel any change in upcoming days.

      We discussed figures of the article below which suggests that the difference is not always adverse. In most cases, engine RPMs don't remain same for same/similar torque delivery before the uodate.

      Dieselgate: Volkswagen cars lose power after fix | Teknikens Värld

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      Last edited by Jack Sparrow; 15th Apr 2017 at 20:06.

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      Quote Originally Posted by Jack Sparrow View Post
      He also took me on final examination drive of one 1.2 TDI which got the update, I also had a short drive of that car and didn't feel any significant change.
      1.2 TDI update is more the exception than the rule, in the sense that the update does not suck. For the other popular VAG models here, the updated tunes post the scandal suck big time.
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      Quote Originally Posted by Jack Sparrow View Post
      But at the end of the day, ended up getting the update after having long chat with a friendly technitian.
      I asked the Service Advisor to skip the update for my 1.5 TDI when i went in for 2nd paid service. He said have done many and no issues reported yet, i replied the car is perfect now, and doesn't want to fiddle with it. He reminded me about warranty issues for that i showed him newsletter in VW website stating the cars are roadworthy and no issues. He mentioned customer not approved for the update in the bill.

      Its only for the performance i bought the GT TDI over Highline paying a premium and though its remapped now by code6 , i was told its difficult to make power from post scandal map. So didn't want to take chances.
      VW POLO GT TDI- Code6'ed
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      Well, found this update in one of FB group of VW owners:





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      Quote Originally Posted by Jack Sparrow View Post
      Well, found this update in one of FB group of VW owners
      Doubt any of that is true and is possible to screw up so many things with an altered map from the factory. Remember to not trust EVERYTHING you read on social media.
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      Recently, one of my colleagues shared his story of experience with the recall.
      With his permission, I am sharing some excerpts from his email (with the intention of just sharing information. I am fully aware that problem might be one-off)

      ...
      ...
      After that Volkswagen had started calling up the customers for the diesel engine software update re-call to fix the impacted vehicles.

      Diesel Service Action

      I had a check with my car’s VIM number and found that mine was an impacted one. Later Volkswagen had called me to do the diesel service action. Before performing the same, I had a double check with Volkswagen, is there any after effect. They had reaffirmed that absolutely there will not be any issues after upgrading the software. But after the software update, the moment I took my car out of the Volkswagen Service Centre (Elite Motors, Hosur Main Road, Singasandra, Bangalore), I got shocked to hear the engine knocking noise. When I had check with them, they said they have to do an engine adaptation and calibration test, which will take a day. Later they had requested me to leave my car for a day to perform the same and I did so. On the same day evening, they had given my car back, but the issue remained unresolved. Later they said that the car has to run about 1000 KMS to get adapted to the new software update. But Now I have closed about 3000 KMS, but still with the engine noise. I had written an email to Volkswagen India head about this issue, but no response.
      ...
      ...

      I had also filed a RTI (attached) to ARAI https://www.araiindia.com/ to find out on what basis they had certified the diesel service re-call action, when the car engine is making so much of noise. Finally decided to file a lawsuit against Volkswagen and currently doing the paper work.

      Click image for larger version. 

Name:	RTI_ARAI.png 
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      ...
      If any of you or colleagues are facing the similar issue, please unicast me.

      As a group, will try to approach them to get this issue resolved.


      So, it seems there has been some serious damages due to the Dieselgate and not just to the environment.

      ~Yeti
      Last edited by Yeti; 28th Apr 2017 at 13:15.

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      Quote Originally Posted by Yeti View Post
      engine knocking noise
      Just Diesel/injector clatter. Diesels dont "knock". And for many Diesel gate VW updates, this is a common issue. Can only be fixed with a retune, probably VW will do it in a later software release.
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      Quote Originally Posted by tadukuttan View Post
      probably VW will do it in a later software release.
      Thanks. I think the "knock" was used loosely in this case. I will take this input about the retune to my colleague. If this is the case, it is worse as the service people do not know enough about such issues themselves !

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